Mercurial > hg > extraction-interface

annotate geotemco/js/Time/TimeDataSource.js @ 29:fc7342914cdf

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develop_v0
author Zoe Hong <zhong@mpiwg-berlin.mpg.de>
date Thu, 05 Mar 2015 15:08:09 +0100
parents b12c99b7c3f0
children
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1 /*
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2 * TimeDataSource.js
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3 *
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4 * Copyright (c) 2012, Stefan Jänicke. All rights reserved.
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5 *
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6 * This library is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
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8 * License as published by the Free Software Foundation; either
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9 * version 3 of the License, or (at your option) any later version.
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10 *
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11 * This library is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * Lesser General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU Lesser General Public
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17 * License along with this library; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 * MA 02110-1301 USA
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20 */
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21
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22 /**
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23 * @class TimeDataSource, TimeSlice, TimeStack
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24 * implementation for aggregation of time items
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25 * @author Stefan Jänicke (stjaenicke@informatik.uni-leipzig.de)
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26 * @release 1.0
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27 * @release date: 2012-07-27
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28 * @version date: 2012-07-27
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29 *
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30 * @param {JSON} options time configuration
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31 */
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32 function TimeDataSource(options) {
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33
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34 this.options = options;
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35 this.timeSlices = [];
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36 this.unit
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37 this.minDate
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38 this.maxDate
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39 this.eventSources
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40 this.events
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41 this.leftSlice
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42 this.rightSlice
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43
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44 this.hashMapping
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45
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46 };
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47
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48 TimeDataSource.prototype = {
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49
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50 findTimeUnits : function(granularity, timeUnit, pixels) {
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51
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52 var time = SimileAjax.DateTime;
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53 this.availableUnits = [];
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54 var givenUnits = SimileAjax.DateTime.gregorianUnitLengths;
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55 for (var i = 0; i < givenUnits.length; i++) {
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56 if (granularity > i) {
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57 continue;
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58 }
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59 var slices = 0;
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60 var t = new Date(this.minDate.getTime());
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61 do {
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62 time.roundDownToInterval(t, i, undefined, 1, 0);
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63 slices++;
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64 time.incrementByInterval(t, i, undefined);
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65 } while( t.getTime() <= this.maxDate.getTime() && slices < pixels+2 );
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66 if (slices > 0 && slices <= pixels) {
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67 this.availableUnits.push({
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68 unit : i,
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69 slices : slices,
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70 label : SimileAjax.DateTime.Strings[GeoTemConfig.language][i]
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71 });
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72 }
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73 }
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74 var unitDiff200 = pixels + 1;
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75 for (var i = 0; i < this.availableUnits.length; i++) {
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76 var diff = Math.abs(this.availableUnits[i].slices - 200);
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77 if (diff < unitDiff200) {
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78 unitDiff200 = diff;
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79 this.unit = this.availableUnits[i].unit;
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80 }
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81 }
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82
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83 },
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84
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85 getUnitIndex : function() {
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86 for (var i = 0; i < this.availableUnits.length; i++) {
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87 if (this.unit == this.availableUnits[i].unit) {
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88 return i;
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89 }
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90 }
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91 return 0;
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92 },
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93
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94 setTimeUnit : function(unit) {
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95 this.unit = unit;
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96 this.initializeSlices();
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97 },
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98
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99 /**
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100 * initializes the TimeDataSource
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101 * @param {Timeplot.ColumnSource[]} dataSources the column sources corresponding to the data sets
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102 * @param {Timeplot.DefaultEventSource[]} eventSources the event sources corresponding to the column sources
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103 * @param {TimeObject[][]} timeObjects an array of time objects of different sets
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104 * @param {SimileAjax.DateTime} granularity the time granularity of the given data
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105 */
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106 initialize : function(dataSources, eventSources, timeObjects, granularity, timeUnit, pixels) {
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107
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108 this.dataSources = dataSources;
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109 this.eventSources = eventSources;
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110 this.timeObjects = timeObjects;
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111
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112 this.minDate = undefined;
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113 this.maxDate = undefined;
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114 this.hashMapping = [];
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115 this.projHashMapping = [];
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116
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117 for (var i = 0; i < timeObjects.length; i++) {
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118 this.hashMapping.push([]);
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119 this.projHashMapping.push([]);
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120 for (var j = 0; j < timeObjects[i].length; j++) {
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121 var o = timeObjects[i][j];
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122 if (o.isTemporal) {
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123 var g = o.dates[this.options.timeIndex].granularity;
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124 //o.getTimeGranularity(this.options.timeIndex);
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125 if (g == null) {
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126 continue;
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127 }
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128 var time = o.dates[this.options.timeIndex].date;
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129 //o.getDate(this.options.timeIndex);
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130 if (this.minDate == undefined || time.getTime() < this.minDate.getTime()) {
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131 this.minDate = time;
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132 }
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133 if (this.maxDate == undefined || time.getTime() > this.maxDate.getTime()) {
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134 this.maxDate = time;
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135 }
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136 }
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137 }
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138 }
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139
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140 if (this.minDate == undefined) {
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141 this.minDate = this.options.defaultMinDate;
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142 this.maxDate = this.options.defaultMaxDate;
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143 }
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144
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145 this.findTimeUnits(granularity, timeUnit, pixels);
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146 this.initializeSlices();
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147
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148 },
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149
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150 initializeSlices : function() {
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151 for (var i = 0; i < this.dataSources.length; i++) {
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152 this.dataSources[i]._range = {
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153 earliestDate : null,
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154 latestDate : null,
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155 min : 0,
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156 max : 0
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157 };
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158 }
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159 this.timeSlices = [];
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160 var time = SimileAjax.DateTime;
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161 var t = new Date(this.minDate.getTime() - 0.9 * time.gregorianUnitLengths[this.unit]);
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162 do {
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163 time.roundDownToInterval(t, this.unit, undefined, 1, 0);
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164 var slice = new TimeSlice(SimileAjax.NativeDateUnit.cloneValue(t), this.timeObjects.length, this.dataSources.length);
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165 this.timeSlices.push(slice);
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166 time.incrementByInterval(t, this.unit, undefined);
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167 } while (t.getTime() <= this.maxDate.getTime() + 1.1 * time.gregorianUnitLengths[this.unit]);
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168
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169 for (var i = 0; i < this.timeObjects.length; i++) {
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170 var projId = i;
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171 if( this.dataSources.length == 1 ){
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172 projId = 0;
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173 }
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174 for (var j = 0; j < this.timeObjects[i].length; j++) {
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175 var o = this.timeObjects[i][j];
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176 if (o.isTemporal) {
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177 var date = o.dates[this.options.timeIndex].date;
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178 //o.getDate(this.options.timeIndex);
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179 for (var k = 0; k < this.timeSlices.length - 1; k++) {
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180 var t1 = this.timeSlices[k].date.getTime();
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181 var t2 = this.timeSlices[k + 1].date.getTime();
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182 var stack = null, projStack = null;
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183 if (date >= t1 && date < t2) {
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184 stack = this.timeSlices[k].getStack(i);
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185 projStack = this.timeSlices[k].getProjStack(projId);
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186 }
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187 if (k == this.timeSlices.length - 2 && date >= t2) {
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188 stack = this.timeSlices[k + 1].getStack(i);
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189 projStack = this.timeSlices[k + 1].getProjStack(projId);
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190 }
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191 if (stack != null) {
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192 stack.addObject(o);
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193 projStack.addObject(o);
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194 this.hashMapping[i][o.index] = stack;
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195 this.projHashMapping[i][o.index] = projStack;
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196 break;
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197 }
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198 }
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199 }
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200 }
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201 }
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202
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203 this.events = [];
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204 for (var i = 0; i < this.eventSources.length; i++) {
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205 var eventSet = [];
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206 for (var j = 0; j < this.timeSlices.length; j++) {
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207 var value = new Array("" + this.timeSlices[j].projStacks[i].value);
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208 eventSet.push({
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209 date : this.timeSlices[j].date,
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210 value : value
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211 });
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212 }
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213 this.eventSources[i].loadData(eventSet);
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214 this.events.push(eventSet);
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215 }
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216
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217 this.leftSlice = 0;
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218 this.rightSlice = this.timeSlices.length - 1;
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219
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220 },
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221
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222 getSliceNumber : function() {
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223 return this.timeSlices.length;
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224 },
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225
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226 /**
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227 * computes the slice index corresponding to a given time
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228 * @param {Date} time the given time
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229 * @return the corresponding slice index
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230 */
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231 getSliceIndex : function(time) {
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232 for (var i = 0; i < this.timeSlices.length; i++) {
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233 if (time == this.timeSlices[i].date) {
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234 return i;
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235 }
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236 }
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237 },
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238
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239 /**
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240 * returns the time of a specific time slice
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241 * @param {int} time the given slice index
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242 * @return the corresponding slice date
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243 */
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244 getSliceTime : function(index) {
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245 return this.timeSlices[index].date;
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246 },
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247
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248 /**
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249 * shifts the actual zoomed range
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250 * @param {int} delta the value to shift (negative for left shift, positive for right shift)
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251 * @return boolean value, if the range could be shifted
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252 */
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253 setShift : function(delta) {
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254 if (delta == 1 && this.leftSlice != 0) {
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255 this.leftSlice--;
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256 this.rightSlice--;
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257 return true;
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258 } else if (delta == -1 && this.rightSlice != this.timeSlices.length - 1) {
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259 this.leftSlice++;
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260 this.rightSlice++;
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261 return true;
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262 } else {
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263 return false;
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264 }
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265 },
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266
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267 /**
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268 * zooms the actual range
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269 * @param {int} delta the value to zoom (negative for zoom out, positive for zoom in)
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270 * @param {Date} time the corresponding time of the actual mouse position on the plot
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271 * @param {Date} leftTime the time of the left border of a selected timerange or null
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272 * @param {Date} rightTime the time of the right border of a selected timerange or null
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273 * @return boolean value, if the range could be zoomed
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274 */
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275 setZoom : function(delta, time, leftTime, rightTime) {
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276 var n1 = 0;
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277 var n2 = 0;
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278 var m = -1;
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279 if (delta > 0) {
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280 m = 1;
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281 if (leftTime != null) {
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282 n1 = this.getSliceIndex(leftTime) - this.leftSlice;
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283 n2 = this.rightSlice - this.getSliceIndex(rightTime);
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284 } else {
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285 slice = this.getSliceIndex(time);
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286 if (slice == this.leftSlice || slice == this.rightSlice) {
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287 return;
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288 }
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289 n1 = slice - 1 - this.leftSlice;
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290 n2 = this.rightSlice - slice - 1;
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291 }
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292 } else if (delta < 0) {
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293
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294 n1 = this.leftSlice;
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295 n2 = this.timeSlices.length - 1 - this.rightSlice;
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296 }
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297
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298 var zoomSlices = 2 * delta;
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299 if (Math.abs(n1 + n2) < Math.abs(zoomSlices)) {
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300 zoomSlices = n1 + n2;
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301 }
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302
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303 if (n1 + n2 == 0) {
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304 return false;
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305 }
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306
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307 var m1 = Math.round(n1 / (n1 + n2) * zoomSlices);
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308 var m2 = zoomSlices - m1;
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309
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310 this.leftSlice += m1;
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311 this.rightSlice -= m2;
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312
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313 return true;
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314 },
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315
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316 /**
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317 * resets the plots by loading data of actual zoomed range
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318 */
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319 reset : function(timeGeometry) {
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320 for (var i = 0; i < this.eventSources.length; i++) {
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321 this.eventSources[i].loadData(this.events[i].slice(this.leftSlice, this.rightSlice + 1));
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322 if (i + 1 < this.eventSources.length) {
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323 timeGeometry._earliestDate = null;
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324 timeGeometry._latestDate = null;
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325 }
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326
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327 }
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328 },
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329
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330 /**
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331 * Getter for actual zoom
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332 * @return actual zoom value
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333 */
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334 getZoom : function() {
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335 if (this.timeSlices == undefined) {
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336 return 0;
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337 }
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338 return Math.round((this.timeSlices.length - 3) / 2) - Math.round((this.rightSlice - this.leftSlice - 2) / 2);
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339 },
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340
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341 /**
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342 * Getter for date of the first timeslice
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343 * @return date of the first timeslice
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344 */
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345 earliest : function() {
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346 return this.timeSlices[0].date;
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347 },
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348
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349 /**
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350 * Getter for date of the last timeslice
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351 * @return date of the last timeslice
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352 */
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353 latest : function() {
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354 return this.timeSlices[this.timeSlices.length - 1].date;
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355 },
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356
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357 setOverlay : function(timeObjects) {
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358 for (var i = 0; i < this.timeSlices.length; i++) {
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359 this.timeSlices[i].reset();
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360 }
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361 for (var j in timeObjects ) {
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362 for (var k in timeObjects[j] ) {
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363 var o = timeObjects[j][k];
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364 if (o.isTemporal) {
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365 if (o.getTimeGranularity(this.options.timeIndex) == null) {
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366 continue;
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367 }
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368 this.hashMapping[j][o.index].overlay += o.weight;
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369 this.projHashMapping[j][o.index].overlay += o.weight;
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370 }
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371 }
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372 }
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373 },
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374
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375 size : function() {
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376 if (this.timeSlices.length == 0) {
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377 return 0;
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378 }
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379 return this.timeSlices[0].stacks.length;
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380 }
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381 };
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382
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383 /**
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384 * small class that represents a time slice of the actual timeplot.
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385 * it has a specific date and contains its corrsponding data objects as well
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386 */
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387 function TimeSlice(date, rows, projRows) {
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388
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389 this.date = date;
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390 this.selected = false;
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391
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392 this.stacks = [];
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393 this.projStacks = [];
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394 for (var i = 0; i < rows; i++) {
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395 this.stacks.push(new TimeStack());
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396 }
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397 for (var i = 0; i < projRows; i++) {
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398 this.projStacks.push(new TimeStack());
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399 }
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400
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401 this.getStack = function(row) {
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402 return this.stacks[row];
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403 };
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404
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405 this.getProjStack = function(row) {
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406 return this.projStacks[row];
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407 };
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408
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409 this.reset = function() {
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410 for (var i in this.projStacks ) {
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411 this.stacks[i].overlay = 0;
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412 this.projStacks[i].overlay = 0;
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413 }
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414 };
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415
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416 this.overlay = function() {
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417 var value = 0;
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418 for (var i in this.projStacks ) {
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419 if (this.projStacks[i].overlay > value) {
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420 value = this.projStacks[i].overlay;
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421 }
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422 }
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423 return value;
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424 };
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425
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426 };
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427
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428 /**
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429 * small class that represents a stack for a time slice which
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430 * holds items for different datasets for the specific time range
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431 */
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432 function TimeStack() {
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433
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434 this.overlay = 0;
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435 this.value = 0;
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436 this.elements = [];
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437
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438 this.addObject = function(object) {
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439 this.elements.push(object);
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440 this.value += object.weight;
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441 };
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Zoe Hong <zhong@mpiwg-berlin.mpg.de>
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442
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Zoe Hong <zhong@mpiwg-berlin.mpg.de>
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443 };